Feeding mechanism for metal-working machinery



. r '1,637,969 A. M. sosA Aug..- 2, 1927.

' FEEDING MECHANISM FOR METAL WORKING MACHINERY Filed July 21, 1924 5 Sheets-Sheet 1 Aug; 2, 1927'. 7969 A. M. SOSA FEEDING MECHANISM FOR-METAL WORKING MACHINERY Filed July 21. 1924 5 s h t s 2 rip 5 I I87 I86 I80 H8193 I95 as? m 3% ms Aug. 2, 1927.

FEEDING FOR METAL WORKING MACHINERY Filed July 21, 1924 s Sheets-Sheei 5 INVENTOR,

Aug. 2, 1927. 1,637,969

A. M. sosA FEEDING MECHANISM FOR METAL wommxe MACHINER Y Filed July 21/1924 5 Sheets-Sheet 4 5 '76 as N (32 Isl ug- 1927' A. M. sosA FEEDING MECHANISM FOR METAL WORKING MACHINERY Filed July 21. 1924 5 sheds-she t 5 (J5 2.8 220 ZIQ I83 /Nl/ENTOR.

Patented Aug. 2, 1927.

' AUGUSTUS M. sosA, or CINCINNATI, OI-II wonxs COMPANY, OF CINCINNATI,

O, ASSIGNOB TO THE AMERICAN TOOL OHIO, A CORPORATION OF OHIO.

FEEDING MECHANIsM son METAL-WORKING MACHINERY.

Application filed July 21 My invention relates to feeding mechanism for metal working machinery, and is exemplified as applied for feeding the saddle of a so-called metal shaper, for presenting the work in successive or intermittent steps to the'action of the tool, which is instanced as mounted on a reciprocating ram.

In machinery of this character, it is usual to mount the work upon a saddle which is feedable crosswise of the vertical plane in which the tool reciprocates, the saddle being slidable upon a rail, which is adjustable up and down with relation to the path of "the tool. It is usual also to initiate the feedi g movements from afixed point of the machine, for instance, from the X18 of rotation of the bull-wheel.

The

point for application of the feeding movements is therefore stationarilyv posiliioned,

and the pointfor reception of the feeding movements at the feeding device is adjustable vertically in a right line, resulting in different distances between said points at different elevations of the rail. It is one of the objects of the invention to compensate for the variant distances between these two po It is ints.

the object of the, present invention,

further, to provide novel means whereby to automatically maintain the means for applying the feeding movements, the means for receiving the feeding movements, and, the connecting means therebetween, at-.substan tial distance and angular relations to each other.

A. furtherobject is to provide novel permit in the train of mechanism for acoom-.

g the feeding movements, wherebyto yield due to the variant distances between points in the power applying mechanism and the power receiving mechanism during adjustments to elevation of the power receiving mechanism; and, further, to provide novel means. whereby to automatically returnthe yielding member of said mechanism tovnormal relation.

A further object of the invention is to provide novel safety means whereby yield is, permitted in thefeeding train to compensate for obstruction to feedingmovement 0 f the element being fed, for instance,

1924. Serial N0. {27,104.

when the saddle reaches the end of its feeding path; and, further, to provide novel gauging means for the adjustments of lengths of feeding movements.

The invention will be further readily understood from the following description and claims, and from the drawings, in which latter Fig. 1 is a sidev elevation of a shaping ma chine, partly broken away, and embodying my invention.

Fig. Q-is a plan View of my invention, partly in horizontal section on the irregular line 2-2 of Fig. 1.

Fig. 3 is a vertical cross-section of the. clutch, taken on the line 8-3 of Fig. 2,

Fig. 4 is a diagrammatic view of the gearin for the same.

Fig. 5. Fig.

7 is a front view detail of the ratchet mechanism, with the gear-casing shown in vertical section on the line 77 of Fig. 6.

Fig. 8 is a detail of the gauging mechanism, shown in horizontal section onthe line 8-8 of Fig. 1.

Fig. 9 is a vertical section of the feed actuating mechanism, taken on the hue 9-9 of Fig. 1.

Fig. 10 is a bottom view of the same. Fig. 11 is a; vertical section ofthe same, taken in the plane of the line. 11 11 of Fig. 9.

Fig. 12 is a vertical section of the same, taken in the plane of the line 1212 of Fig. 9.

Fig. 13 is a horizontal section of the, same, taken in the plane of the line 13-13 ofFi'g.

Fig. 1 1 is a horizontal sectionof a detail of the, same, taken in the plane of thefline Fig. 15 is ahorizontal sectional detail of the clutch shifting mechanism, taken on the 11ine15-15 of Fig. 5.

machine exemplified comame 21, on which there is an The shaping prises. ausua-l r upper guideway 22; A

tool-ram 23 is reciprocated lengthwisein the guideway, and has thereon a usual tool-holder 24, in which there is a tool 25.

The ram is arranged to be reciprocated by means of a usual rockcr-arm 20, pivoted at its lower end on a shaft 27, and at its upper end articulated with a nut-block 28 by means of a link 29, the ram being adjustable in usual manner with relation to the nut-block for positioning the path of stroke of the tool. 7

The work is arranged to be supported on a usual work-table 31, suitably secured to a saddle 32, adjustable crosswise of the tool on a rail 33, along guid ways 34, This lateral adjustment of thesaddle is effected by means of a fees-screw 36, which is threaded to a usual nut 37 on the saddle, the feed-screw being journaled in suitable b ir ings on the rail, one of which is shown at 38.

The rail is adjustable up and down on the frame, on guideways 41 on the frame, toward and from the path of reciprocation of the tool-ram, the adjustment being effected by means of a usual nut, journaled and held endwise on the rail, and manually or otherwise rotated in usual manner, and threaded about a screw 42 supported in endwise relation on the has 43 of the machine.

The feeding movements of the saddle are effected in synchronism with the reciprocating movements of the ram, taking place usually during the idle or return strokes of the ram. It is desirable, therefore, and usual to have the same point for power application for the feeding movements and for the reciprocations of the ram, instanced as the bull-wheel 45, the axis of rotation. of vhich may be instanced as the fixed point for power application for the ram and for the feeding train.

The bull-wheel has a hub 47, in which there is a usual cross-guide 48, in which a block 49.is arranged to be adjusted by a feed-screw 50, having a bevel-pinion 51 fixed thereto, which is meshed by a bevel-gear 52 on a shaft 53, having an adjusting handle 54 at its outer end. (See Figs. 2, 9 and 10).

The block 49 has a usual crankpin 58 thereon, surrounded by a usual slideblock 59, reciprocating in a guideway 60, on the rocker-arm 26, for translating the planetary movements of the crank-pin into the usual rocking movements of the arm 26 for reciprocating the ram. (See Figs. 1 and 2).

The hub of the bull-wheel is provided with an extension 63, in which there is a bushing 64, which is fixed to the bull-wheel so as to rotate therewith by a screw 65.

An eccentric block 67 is fixed to this bushing, as by a key 68- and a positioning screw '69. The eccentric block has an ec- 'coacting shoulders for the shoulders 104 slideway 72 of a lever 73, shown as a rockerarm. (See Figs. 9 and 11).

The hub of the bull-wheel is provided with a journal-sleeve 75, rotatable in a bearing 76 of the frame of the machine.

A journal-stud 79 is fixed to this hearing by screws 80, the journal having an annular flange 81 through which the screws are re ceived. The flange spans'the outer end of the hub of the bull-wheel.

A housing 83 comprises an inner section 84 and an outer section 85, connected by screws 86. It has a bearing 91 about the journal-stud 79 and a bearing 92 about a bushing 93 in which the shaft 53 is journaled. (See Figs. 2 an'd -9).

An arm 95 has a bearing 96 about an inner journal 97 of the housing, and constitutes a lever. This lever has a normal p01 sition with relation to the housing, which normal position is preferably a central position parallel with the normal position of the lever 73.

In order to maintain such relative normal position between the lever 95 and the housing, but to permit yield therebetw-een upon application of undue strain between the parts, I provide means whereby such yielding is permitted, (see Figs. 9, 12 and 13), exemplified as a spring 101,'the ends of which are received in thimbles 102, 103, provided with enlargements forming annular shoulders 104, 105, the enlargements having endwise movements in a bore 106 of. said lever. Collars 107, 108, are fixed to the sides of said lever, as by screws 109, and form The spring and thimbles are preferably assembled by means of a shank comprising the sections 111, 112, having threaded C011- nection 113 between the same for counecting the same, and provided with heads 114, 115, arranged to abut the side Walls 116, 117, of said housing. The heads are provided with flat sides 118 for turning the shank-sections. (See Figs. 9, 12 and 13.)

hen an undue lateral strain is applied to said lever in one direction, one of said thimbles will yield for compressing said spring, and for returning the lever to nor mal relation, and when said lever has undue strain applied thereto in the opposite direction, the other of said thimbles will yield, causing compression of the spring, the spring returning the parts to normal relation when said undue pressure has ceased.

Similar relative yieldingmovements take place when the undue strain is applied to the housing, in which case one or theother of said walls 116, 117, causes compression ofsaid spring in one or the opposite direc tion, the spring returning the parts to normal relations when such undue strain has been removed.

The lever 73 has an adjusting screw 121 guideway. The block has a crank-pin 133,

thereon. r j j j The screw has a bevel-pinion 135 fixed thereto, which is meshed by a bevel-gear 136, fixed to a shaft 137, journaled in a bear-' ing-block 138, fixed to the lever 73 by screws 139, this bearing-block being provided with an annular flange 140, through which said screws pass into a journal-stud 141 onsaid lever. (See Figs. 9 and 11.) Said journalstud isjournaled in a bearing 142 in the housing, providing pivotal movement for said lever on the housing. The construction holds these journals and bearings in en-dwise relation.

A handle 143 is fixed to said shaft for rotating the bevel-gear 136, and thereby adjusting the articulating pin 133 lengthwise of said lever for adjusting the lengths of feeding movements of the work.

Gauging means are provided for gauging said lengths of feeding movements, exemplified as a pinion 146, fixed to the shaft 137,

thehandle 143 being received about the'hub 147 of said pinion. pinion meshes with a gear 148, ournaled on a stud-shaft 149, fixed in the flange 140,

v and being fast with a pinion 150, which said gears through meshes with a'gear 151, journaled about the hub 147 of the pinion 146, and in a'bearing 152' of a cap 153' of the housing, fixed to the body of said housing by-screws 154.

An index-plate 158'is fixed to rotate'with' the hub 1590f said gear 151, as by a key 160. The said gear, the said dial-plate and the handle 143 are held in e'ndwise relation for endwise positioning of the parts, by hav-' ing suitable shoulders thereon and on the bearing 152,- a pm 161 being received throughsaid handle, the hub 147 and the shaft137. P

An index finger 165 is 'securedto the flange. 140, (see Figs. 1, 2 and 8) and projects past a slot 166 in the cap 153,

lTheslot- 166 is provided for permitting relative rocking movements between the "housing 83 and, the lever 7 to whichlatter said index-finger is secured.

The adjusting screw 121. is provided with acollar 170, fixed thereto by a screw 171;, and having alocating socket 17 2, nto which 7 (See Fig. 9). 'Thisa coacting ball 173, located in a socket 174, of a bracket 175, on the arm 73, is arranged to be received, the ball being urged into said locating socket 172 by means of aspring 176 in said socket 174. c Y

'The structure and relation of the parts are such that coact'ive relation. between said ball and said socket is obtained at each revolution of the adjusting screw, thereby indicating to the operator who manipulates the handle 143, that'a complete revolution of said-adjusting screw has been; effected, and that consequently an adjustment of distance of feeding movement ofthe work corresponding to a revolution of the screw has taken place. Thus, if said adjusting screw has a thread of one-half inch lead, a resultant feeding adjustment has'been effected.

It maybe instanced that theindex on the index-plateis divided in graduations repr resenting one hundred and fifty thousandths of an inch in variation of feeding distances 5 between'the work and the too]. It may be further instanced that said one hundred and fifty thousandths of an inch, represented on" the circumference of the index-plate, are divided intofifteen divisions, each representing ten one-thousandths, indicated by the division lines on said index, and that one revolution of the adj Screw 121- I resents a variation in feeding movements of said ten one-thousandths of an inch.

Theoperator instinctively knows thateach time there is coaetion between said ball and said socket, which he can feelint-urning the screw, he'has adjusted the handle 143 the equivalent of tenIone-thousandths of an inch variation in the feeding strokes,

If, therefore, he is required to make an adjustment representing a number of ten one-thousandths of an inch,he can note the relative position of the index-finger and the index, and quickly mentally calculate the number of ten one thousandths of an inch it will be necessary for him to pass on .the index inorder to eilect the proper correlation between the index-finger and the index desired, and quickly rotate the adjusting handle accordingly, the said rotations causing coact-ion between the ball and socket for the equivalent of each ten onethousandths of movement ott'the dial, the

operator feeling these -coactions at the handle, making'it unnecessary vtor him to.

view the dial during such main adjustments. The ball and socket areprovided; for the further purpose, that the r coactiojn insures re 'istr between the res jective division linesgan'd the index finger and guards against inaccuracy on the division line 1 does not register with accuracy with-the finger,- the result might be that the pawlwould n p' s'the' de ed t th n part of thefoperator'in setting thediah lifter instance, an'operator were to set'the dial so that the rec rail by bolts 184.

screw. (See Figs. 2 and 3.)

Gears177, 178, rotate loosely about the feed screw, on a bushing 179 keyed to the feed-screw, and are located in a gear-box 180. (See Figs. 2 and 3.) The gear-box is fixed to the outer end of the rail, as by means of bolts 181, 182, securing the gearboX to a bracket 183, in turn secured to the The bushing is held endwise between a collar 185 fixed to the feed-screw and a collar 186, a nut 187 clamping the latter collar and the bushing endwise on the feedscrew. The feed-screw is held endwise, as by collars 185, 188, at the respective sides of the bearing-38.

The said gears are held in endwisc separated relation. on the bushing, for instance, by means of shoulders 189, 190, on the bush ing, separating movement of the gears being prevented by the collar 185, and a bearing A clutch-collar 195 *eceived' about said bushing, and is held to rotate therewith, as

byv a spline-key. and grooveconnection 196. Clutches 197, 198, are located between the clutch-collar and said respective gears 177, 178, these clutchesbeing shown as toothed clutches, the teeth whereof are respectively on said clutch-collar and said The clutch-collar is operated by means of a finger 201, received in an annular groove 202 in said clutch-collar, and fixed to a rack-rod 203, having endwise movement in a bearing 204, of the bracket 183, fixed to the rail 33. (See Fig. 5.) Means are provided for preventing the rack-rod from turning, as by a spline-key andgroove connection 205 between it and its hearing.

A pinion 208 is on a shaftp209, and meshes withthe rack. This shaft is journaled in a bearing 210 in said bracket. It is provided with an annular groove 211,,into which the end of a bolt 212, threaded into said bracket, is received, for holding said shaftendwise.

The shaft is provided with a handle 213' forrotating the same. Itis providedwith a collar 214, having sockets 215, 216and 217 therein, into'which a plunger 218 is arranged to be selectively received, the plunger being 'spring pressed by a spring 219, in wa' bore 220, in which said plunger operates,

being heldtherein by a threaded plug 221,

threaded into the outer threaded end of said 7 bore. Engagement between the springpressed plunger and the intermediate socket maintains the clutch-collar in intermediate Y or neutral position.

The turning of the handle. for engagement of either clutch causes engagement between said springpressed plunger and one of the side socket-s,

for maintaining clutch engagement.

A ratchet-wheel 225 is rotatable about a stud-shz-ift 226, fixed in bearings 227, 228, respectively in said bracket and the gear housing. (See Figs. 5, 6 and7.) A gear 229 is fixed to said ratchet-wheel and rotates therewith. ,7

A pawl-lever231has a bearing 232 about said stud-shaft, and has a pawl 233pivoted thereabout on a pin 234. 7.) Adspring 235 is fixed to the pawl-lever bva bolt 238 and a pin 237 at one end there of, and has pad 238 received against the (Seev Figs. 6 and straight face 239 of the hub of said pawl,

for resiliently causing engagement of the tooth-end of said pawl with the teeth of the ratchet-wheel.

The gear 229 meshes with a gear 241, which rigidly connected with a gear 242 by means of a hub 243, the said gears rotating on a stud-shaft 244, in bearings 245 in the gear-casing. (See Figs; 2 and 5.) The gear 229 also meshes with the gear 178 loose about the feed-screw. The gear 242 meshes with the gear 177. In this manner the gears 177, 178, are rotated in opposite directions,

The extent and direction of movement of clutches is'engaged, and according to the.

-movements of the lever 7 3 "are transmitted as jreciprocating movements to the pawllever 231 by means. of a link 249, having a bearing 250 aboutthe crank-pin 133 and a bearing 25.1. about a shoulder-bolt 252 on the pawl-lever, serving as articulations be tweenthe ends of said link and the levers 73 and 231 respectively. (See Figs. 6,9 and 10.) The length of reciprocating movement thus imparted is governed by the adjustment of the crank-pin 133 lengthwise of the lever'73. W i

The lever rotation of thexjournabstud141, which has fixed relation with-the housing 83, which in turn is normally held stationary on the frame of the machine. The articulation be 3 i'oscillates about the axis. of

down along the guideway 41, on which the rail is adjusted. The distance between the axls of rotationof the bull-Wheel, which is'the point'f0r power application for the feeding movements, and the point for power reception for said feeding movements, which maybe instancedas the axis ofoscillation of the pawl-lever, therefore varies with the adjustmentto elevation ofthe rail.

The distance between the axis of articulation of the lever 7 3-with the link 2 19 and the axis of oscillationof the pawl-lever would also vary with the adjustments to elevation of the rail.

These variations would ordinarily result in variations of distances of feeding movement at the various steps of feeding movement.

Such variations in elevation are compensated for and automatic relocation of the path-of reciprocation of the lever 73 is providedto compensate for the various positions of the rail, in order that the distances ofintermittent feeding movements accomplished by the feed'screw are maintained regardless of the elevation of the rail.

lVhile the present exemplification of my invention permits lar arrangements between the'link 2&9 and the levers atitsrespective-endsin the lower range-of adjustments of the rail, such variations are small and negligible,-especially as such latter adjustments are infrequent.

Such'variations-do not in practice amount to.

the length of a tooth-space in'the ratchetwheel, and consequently the feed is constant throughout'all adjustments-of the rail.

' instancing the compensating feature of the invention, a link 256 is provided, which connects with said rail, being articulated on a shoulder-bolt 257, threaded into the bracket'183. (See Figs. 2 and The other end of the"linkis-articulated on a pin 258, instanced as a bolt, in a bearing 259 on the lever 95.

WVhen'therail 33 is adjusted to a different elevation, causing a difference in distance between the articulating axis of the articulation 133 and'the oscillating axis of the pawllever, thelever 95 yields to such adjustment, resisted by the spring'lOl, thedirection of such yielddepending on whether such adjustment lengthens or shortens the distance between said axes.

' If such adjustment takes place while'the bull-wheel is at rest, the-housing 83 and the lever 73 are in relatively rigid relations,

due-to relatively fixed relation between thejournal 1 11, the bearings 1 1-2 and 91 of the housingfithe journal 97 of the lever 95 in the lat-teiy'andthenon-rotating eccentric 70, its block 71 and the guideway 72 0f said lever. This causes yield of the lever 95 to take place with relation to the housing'83, resisted by the spring 101.

Amomentary change in position of the pawl-lever also takes place, the pawl moving idle on the ratchet-wheel in retracting dislight variation in angurection, if such adjustment of'the rail-effects an increasing of the distance between said axes, and if said distance is decreased by such adjustment, a slight advancing rotation of the pawl is caused.

Vfhen such adjustment of the rail has been effected, and rotation of the bull-wheel is again begun, whereby rotation of the eccentric is again initiated, thereby permitting I rocking movement of the housing 83 and the lever 73, the spring 101 causes the housing to again assume its normal position with relation to the lever 95, which is a central position, as shown in Fig. 11.

The radial position of the housing about its stud-journal 79 is changed by such rocking movement-so that said housing,'instead of being in normal vertical position, shown in Figs. 11 and 12,-will be at an angle to said vertical position, at either side of its norn vertical plane, according to whether said adjustment of the rail has moved saidlever 95 to the right or to the left. Such movement may be described as planetary about the axis of the bull-wheel.

'Such change of radial position of the housing Will also change the normal radial position of the lever 73 so that said lever 73, instead of reciprocating to equal extents at both sides of the vertical plane coincident with its axis of oscillation, as instanced and shown in the drawings, will reciprocate at both sides of a plane at an angle thereto. The lever 73 is instanced as parallel with the housing 83 when the high point of the eccentric 70 is coincident with the right line passing through its axis of rotation and central with said lever 7 3.

If such adjustment of the rail takes place while theram is operating, that. is to say, while, the eccentric 70 is rotating, the position of the housing and of the normal location of .the lever 7 3 will automatically and stepwise follow the movements of the lever 95, induced by the change of adjustment of the rail, for the reason that the rotation of said eccentric will neutralize in stepwise manner-what would otherwise be the aforesaid locked relation of said housing and lever 73.

The resistance of the spring 101 is preferably substantially greater than the resistance to feeding movement of the feed-screw, so that the position of the housing is normally stationary and fixedly related to the lever 95 during the usual feeding movements of the lever 73 and of the feed-train and. feed-screw.

' During yielding movement of the lever 95, incident to the adjustment of'the rail 33, the

yield takes place. about the axis of rotationofthe eccentric 70 as a center.

Yielding movements of the housing with relation to the lever 95 are also permitted. If,-f0r instance, there should be an undue obstruotion to feeding movement of the saddle or of the feed-screw, occasioned for instance by having the saddle reach the end of" its possible feeding movement, thereby causing a locking of the feed-screw in the nut of the saddle, or for other cause, and the opera tion of the machine continues to normally induce still further feeding movements, there will be a yielding movement of the housing about its axis of rotation about the journalstud 79, due to the fact thatin such relation of parts the articulating pin 138 becomes the fulcrum for the lever 73, the eccentric in its rotations causing reciprocating movements of said lever about said fulcrum and carrying the ournal 141 on the lever 73 with said lever 73 in its reciprocations.

The said journal being journaled in the bearing 142 in the housing, thereby causes reciprocating movements of said housing about the axis of the bearing 91 thereof, about the journal-stud 79. This causes reciprocations of the walls 116, 117, between which the spring 101 is located, for causing yield of said spring with relation to the lever 95, and preventing breakage .of parts, and acting as a safety device for the feeding train.

The change of angular relation of the lever 95 and housing 83, about the axis of rotation of said housing, induced by the ad justment of the rail, also changes the normal angular relation of the pawl-lever, swinging the same about the axis of rotation of the ratchet-wheel, so that the link 249, connecting said lever 73 with said pawl-lever 231,013- erates in a path substantially the same in angular relation with. said levers, in order that the distance of feeding movement imparted ateach reciprocation of the lever 7 to the feed-screw remains the same.

The effective angle between the link 249 and the lever 73 and between said link and the pawl-lever are substantially maintained throughout the adjustments.

It is of course obvious that changes'may be made in the exemplification of my invention which I have preferred to show, without departing from the spirit of my invention within the scope of the appended claims.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is:

-1. In feeding mechanism of the character described, the combination of a feeding as sembly comprising a normally stationary member and a movable member and having a point for power reception, power applying means having a point for power application, adjusting means for positioning said feeding assembly whereby the distance between said points is changed, said power applying means including a normally stationary member and a movable member having a recipromembers, means connecting said normally stationary members for fixing the distancebetween them, and connecting means between said movable members for transmitting intermittent movements from said reciprocating portion of said movable member to said first-named movable member.

2. In feeding mechanism of the character described, the. combination of afeeding assembly comprising a normally stationary member and a movable member and having a point for power reception, power applying means having a point for power applica tion, said power applying means comprising a normally stationary member and a movable member having a reciprocating portion, said members having a normal relation between them, automatically acting. resilient yielding means between said last-named members, means connecting said normally stationary members for fixing the distance between them, connecting means between said movable members for transmitting movements from said reciprocating portion of saidmovable member to said first-named movable member, and adjusting means for said feeding assembly for qualifying the distance between said points whereby said normally stationary member and said movable member of said power applying means are placed in abnormal relation, said automati cally acting resilient yielding means returning said last-named members to substantially normal relation.

3. In feeding mechanism of the character described, the combination of a feeding assembly comprising a normally stationary member and a movable member and having a point for power reception, power applying means having a point for power application, adjusting means for said feeding assembly for qualifying the distance between said points, said power applying means including .a normally stationary member and a movable member, automatic resilient yielding means permitting automatic yielding between said last-named members and causing automatic return to substantially normal relation between said last-named members, means connecting said normally stationary members, and connecting means between said movable members. i

1. In feeding mechanism of the character described, the combination of a feeding assembly comprising a normally stationary member and a movable member, power applying means, adjusting means for said feeding assembly whereby the relative elevation between said feeding assembly and said power applying means is changed, said power applying means including a normally stationary member, .a movable member and an iniern'iediate member, means whereby ,to inlee ill

terpivot said last three members, means permitting automatic yielding at said lastnamed means connectin means between said feeding member, of power applying means? therefor comprising a lever, a support to which said lever is. pivoted, a normally stationary member, automatic yielding means between said last-named support and said last-named normally stationary member, connecting means between said normally stationary members, and connecting means be tween said lever and said movable feeding member.

6. In feeding mechanism of the character described, the combination with a feeding assembly including an adjustable support and a movable feeding member adjustable with said support, of power applying means for said movable feeding member comprising a feeding lever, a positioning part, a pivot for said lever on said positioning part, automatic yielding means for said. positioning part whereby to permit yielding of said last-. named pivot, and a connection between said lever and said movable feeding member, said connection arranged to serve as a fulcrum for said lever during yielding of said positioning part by yielding in said automatic yielding means.

7. In feeding mechanism of the character described, the combination with a: feeding assembly including a movable feeding member, of power applying. means therefor comprising a feeding lever having operative connection with said movable fBGCllIlQ; member,

a yielda ble support to which'said feeding lever is pivoted, means for oscillating said lever, and automatic yielding means to n01.

inal'ly resist yielding of said support, and arranged to permit yielding of said support upon abnormal resistance by said movable feeding member. i i

8. In feeding mechanism of the character described, the combination witha feeding assembly including movable feeding member, of power applying meansfor said movable feeding member comprising a feeding lever, a yieldable support, a pivot thereon for said feeding lever, said feeding lever having operative connection with said mov able feeding member, and automatic yielding means forsaid yieldable support resisting movement of said pi-vot'for saidfeeding lever during normal feeding strains and permitting movement of said lever on said connection during abnormal feeding strains.

9. In feeding mechanism of the character described, thecombination with a feeding assembly including an adjustable support and a movable. feeding member adjustable with said support, of power applying means.

for said movable feeding member comprising a feeding lever, a positioning part, a pivotfor said feeding lever on said positioning part, a pivot for said positioning part, a

normally stationary element, a pivot there-1 for, connecting means between said normally stationary element and said support, automaticyielding means between said positioning part and said normally stationary'e'lement, and .connecting means between said feeding lever and said movable feeding meniber comprising a pivot for said feeding lever.

10. In feeding mechanism of the character described, the combination with a feeding assembly includingv a support andfamovable feeding. member,'aiid means for adjusting the position of said support, of a power applying means for said movable feeding member comprising a normally stationary lever, a positioning part, asecond'lever, a fulcrum between said normally stationary lever and said positioning part, a fulcrum between said second-namedlever and said positioning part, an operative connection movable feeding memberand whereby said second-named lever. is movableon said lastnamed fulcrum during abnormal resistance of said movablefeeding member,

. 11. In feeding mechanism of the character described, ,llllG'COIDblIlillliOli with a feeding assembly including a support and a movable feeding member, and means for adjusting the positioning ofsaid support,.of a power applying means for said movable feeding member, comprising a. normally stationary lever, a positioning part, and a second lever, a fulcrum between said normally stationary lever and said positioning part, an automatic resilient yielding means. between said norinally stationary lever and said positioning part, afulci'uin between said second-named lever and said positioning part, and aiioperative connection between said second-named.

lever and said movable, feeding memberin eluding a fulcrumlfor said second-named lever. I I

. 12. In feedingmechanism of the character describechthe combination with a feeding assembly including an adjustable support and a movable feeding memberadjustable.

with said support, of power applying means for said movable feeding member comprising a feeding lever, a; positioning part, a pivot for sa'idlever onsaidpositioiiing part, a connection between saidlever. andsaid movable feeding member, a locating part for said positioning part, a connection between said locating part and said adjustable support, said positioning part having a normal relation to said locating part arranged to' be shifted by shifting of said locating'part by adjustment .ofsaid support, and auto matic means between said locating part and said positioning part to automatically restore normal relations between said positioning part and said locating part.

13. In feeding mechanism of the character describied,'the combination with afeeding assembly including an adjustable support and a movable feeding member adjustable with said support, of power applying means for said movable member comprising a locating part, a connection between said locating part and said support,:a positioning part, automatic resilient means operatively disposed between said locating part and said positioning part tomaintain normal relations during operation between said positioning part and said locating part, a feeding lever, a pivot for said lever on said positioning part, and a connection between said lever and saidmovable feeding element.

14. In feeding mechanism of the character described, the combination with a feeding assembly including an adjustable support and a movable feeding member adjustable with said support, of power applying means for said movable feeding member comprising a locating part, connecting means between said locating part and said support for shifting said locating part during adjustments of said support, a positioning part, automatic resilient means betweensaid positioning part and said locating part for causing automatic shifting of said positioning part according to the adjustments of said locating part, a pivot for said lever on said positioning part, and a connection between said lever and said movable feeding member.

15. In feeding mechanism of the character described, the combination with a feeding assembly comprising a normally stationary member and a movable member, and means for adjusting said feeding assembly, of operating means for said movable member comprising an eccentric, a housi g pivoted about 7 said last-named lever and said movable member.

16. In feeding mechanism of the character described, the combination of a feeding assembly including an adjustable support, means for adjusting the position of the same,

oted about the axis of rotation of said eccen trio, a normally stationary member pivoted about said axis, connecting'means between said normally stationary members, yielding means between said housing and said second" named normally stationary member, a' lever pivoted to said housing, said eccentric arranged to operate said lever, a connecting member between said lever and said movable mcmbeuand adjusting means between said connecting member and said lever. I

17. In feeding mechanismof the character described, the combination of a feeding assembly comprising a normally stationary member and a movable member, means for vertically adjusting said feeding assembly, and operating means for said feeding assembly con'iprising an eccentricpa housing and a normally stationary lever pivoted about the axis of rotation of said eccentric, automatie resilient yielding means between said housing and said lever, connecting means between said lever and said norn'iallystationary member, a lever pivoted to said housing, said eccentric arranged to operate said lastnamed lever, connecting means between said last-named lever and said movable member, and adjusting means for the latter on said last-named lever, said adjusting means in cluding a ,rotatableshaft having an axis of rotation coincident with the axis of oscillation of said last-named lever.

18. In a metal shaping machine, the'com bination of a feeding assembly including a vertically adjustable suppo'rt',a movable element for imparting steps of feechnnd a relativelystationary element; power applying means for said feeding assembly including a relatively stationary element and a relatively movable element, automaticresiliem; yielding means between said last-named ele ments, connecting means between said relatively stationary elements, connecting means between said movable elements, adjusting means for adjusting the connection between said last-named connecting means and said second-named movable element including a shaft, gauging means therefor. said adjusting means and gaugingmeans including a coacting gauging plate and an indicating finger constituting a pair of indicating.

members, and gearingbetween said shaft and an indicating member of said pair whereby to reduce the speed of said last named member Wlllll relation to sald shaft.

19. In a metal shaping machine, the combination of, a feeding assembly including a movable feeding element for imparting steps of feed, an operating lever therefor, an adjusting screw on said lever, a nut therefor, said operating lever provided with a crank dicating couple to translate given rotations of said screw into coactive positions at said divisions between said finger and index.

20. In a metal shaping machine, the combination with a feeding assembly comprising a normally stationary part and a movable feeding member, of means for operat ing the latter including a housing, a normally stationary lever having connection with said normally stationary part, automatic resilient yielding means between said lever and said housing, a cranklever, a pivot therefor on said housing, an eccentric for operating said crank-lever, the axis of rotation of said eccentricand the pivotal axes of said housing and said normally stationary lever being coincident, connecting means between said crank-lever and said movable feeding member, and means for adjusting said connecting means on said crank-lever.

21. In a metal shaping machine, the combination with the frame, the tool-ram, a feeding assembly, and means for elevating the latter, of a shaft having operative connection with said ram for reciprocating the same, an eccentric rotating therewith, a

housing and a relatively stationary leverpivoted about said shaft, automatic resilient yielding means between said housing and said lever, a crank-lever, a pivot therefor on said housing, said eccentric arranged to operate said crank-lever. a crank on said cranklever, means for adjusting said crank lengthwise of its crank-lever, and connecting means between said crank and said feeding assembly.

22. In a metal shaping machine, the combination with the frame, the toolram, a feeding assembly comprising I a normally stationary part and a movable feeding member, and means for adjusting the elevation of said feeding assembly, of operating means for said feeding assembly including a housing, a crank-lever pivoted thereon, a nor mally stationary lever having connection with said normally stationary part. automatic yielding means between said lastnamed lever and said housing, a crank on said crank-lever, means for adjusting said crank lengthwise of its lever, connecting means between said crank and said feeding assembly, an index-plate, an index-finger therefor, an adjusting shaft for said crank, and reducing gearing between said shaft and said indexp'late, said index-finger stationarilysupported on said crank-lever, said housing comprising a cap for said gearing, and said cap provided with an opening through which said index-finger extends to register with said index-plate.

In testimony whereof, I have hereunto signed my name.

- AUGUSTUS M. SQSA. 

